Mill roll controlling and positioning device.



PATENTED FEB. 19, 1907.

B. O. HALE.

MILL ROLL GONTROLLING AND POSITIONING DEVICE.

APPLICATION FILED JUNE 14, 1906.

2 SHEETS-SHEET 1.

ELlrl No. 844,349. PATENTED PEB. 19, 1907. B. 0. HALE.

MILL ROLL CONTROLLING AND POSITIONING DEVICE.

APPLICATION FILED JUNE14, 1906.

2 SHEETS-SHEET 2.

UNTTED sTATEs PATENT OEEICE.

BERNARD o. HALE, OE DERBY, CONNECTICUT, AssICNOR To EARREL FOUN- DRY a MACHINE COMPANY, OE NEW HAVEN, CONNECTICUT, A CORPO- RATION OF CONNECTICUT.

MILL ROLL CONTROLLING ANDJPOSITIONING DEVIC.

To ufl-Z wiz/m it may Concern.'

Be it known that I, BERNARD O. HALE, a citizen of the United States, residing at Derby, county of New Haven, and State of Connecticut, have invented certain new and useful Improvements in Mill Roll Controlling and Positioning Devices, fully described and represented in the following specification and j the accompanying drawings, forming a part such, for instance, as mills for grinding rubber composition and similar materialthe grinding operation is performed by a pair of rolls, one of which is mounted in sliding bearings. Screws or similar adjusting devices are employed in connection with these sliding bearings, the working relation of the rolls being determined by adjusting the Should foreign objects-such, for instance, as a stone or a bolt-be present in the material to be ground, the rolls being firmly held by the adjusting devices there is liability that the mill will be broken, or if this is to be prevented the rolls must be separated by operating the adjusting screws. This makes it necessary to either slowdown or stop the operation of the mill, and after the foreign body has been removed or it has passed it is necessary to readjust the rolls to bring them into working position. This of course consumes valuable time and decreases the output of the mill.

It is one of the objects of this invention to produce an improved roll controlling and positioning device for the rolls of mills employing large and heavy rolls, in which the working position of the rolls may bedetermined with accuracy and in which it shall be possible to move the rolls quickly out of and into the working position, this movement of the rolls taking place without disturbing the adjusting devices which determine the working relation of the rolls.

A further object of the inventionis to produce an improved roll positioning and controlling device for mills employing large and Specification of Letters Patent.

Application filed June 14,1906. Serial No. 321,710.

Patented Feb. 19, 1907.

heavy rolls, in which means shall be employed for adjusting the working relation of the rolls, means being also provided for maintaining the rolls in working relation under a cushioned pressure in excess of the normal load on the rolls, whereby the rolls may be allowed to separate to avoid breakage of the mill in case a foreign body gets between the rolls, the devices for maintaining the cushioned pressure including means whereby the rolls may be positively separated, if desired.

With these and other objects in view the invention consists in certainl constructions and in certainparts, improvements, and combinations, as will be hereinafter fully described, and then specifically pointed out. l

In the accompanying drawings, Figure l represents in elevation a mill containing the improved roll controlling and positioning devices. Fig. 2 is a sectional elevation on the line 2 2 of Fig. 1. Fig. 3 is a detail sectional view on the line 3 3 cf Fig. 2. Fig. 4 is a detail sectional view on the line 4 4 of Fig. 3. Fig. 5 is a sectional view on the line 5 5 of Fig. 3. Fig. 6 is a detail sectional elevation, on a large scale, of the mill-rolls with a diff erent form of adjusting device. Fig.7 is a section on the line 7 7 of Fig. 6.

Referring to the drawings, the machine selected for the purpose of illustrating the invention is a grinding-mill for grindin rubber composition and similar materia The frame ofthe mill may comprise two side frames or standards, (marked 1,) provided 'with recesses at their upper ends, in which may be located ways 2. These ways may serve to support sliding bearings 3 4 of the usual construction. The bearings 3 may ,support a shaft 5, on which ,is mounted a grinding-roll 6, this roll being ordinarily reerred to as the back roll. may serve to support a shaft 7, on whic is mounted a roll 8, this roll being ordinarily known as the "front roll. These grindingrolls, which serve to macerate and reduce the rubber composition or other material introduced between them, maybe driven in any suitable way. In the construction illustrated there is provided a power-shaft 9, mounted in suitable bearings in a pillowblock 10 on the frame, this shaft being driven from any suitable source of power. y As shown, this shaft is provided with a pinion The bearin s 4 roo 11, which meshes with ory drives a large gear 12, mounted on the shaft 5-of' the' back roll. The other end of the shaft 5 may be provided With one of a pair of intermeshing gears 13, there beingA a similar gear on the shaft 7. With this construction the back roll is directly driven from the power-shaft and serves to drive the front roll.

Means are provided for adjusting the rolls so as to bring them into proper working relation. While these means may be varied, in the best constructions they will include screws', there being one screw for each end of the roll to be adjusted, these screws bein nmarked 14. Each of the screws is provide with an apertured head 15, in the apertures of which a bar or other tool ma be inserted to lturn the screws in order to a just the roll. The adjusting-screws may work in connection with'either the back or the front roll. In the construction illustrated the screws operate in connection with the front roll.

Referring to Figs. 2 and 5, inclusive, the

inner end of each screw is headed, as shown- .at 16 in Fig. 5, and these headed ends take into sockets 17 on the sliding bearings 4. The screws are threaded into sleeves 18, which are' s'up orted in chambered castings 19, which will) be hereinafter referred to, these castings forming in the constructions shown in-'Figs 2 to 5 extensions of the side frames.

In the construction shown in Fi 6 the screws are tappeddirectly through t e ends of the side'frames, the construction being in other respects the same. Means are provided for so controlling the rolls as to enable 'them to be put into or out of working relaj tion` when required, these means being of such a character that when the rolls after they have been separated to put out them of Working relation ma be restored to the lworking relation wit out interfering with the adjustment produced by the screws before described. `In the best constructions, furthermore, the controlling means will be l f -of such a character as to maintain a cushioned pressure on the material between the rolls v tions are illustrated in which the controlling devices operate in connection with the front roll and with the back roll. While thefparticular` construction of the controlling de- 'vice or devices may be varied within wide limits, in the best constructions these devices will be operated by means of `fluid-pressure.

In the construction shown in Figs. 2 to 5,

inclusive, the chambersin the castings 19, before referred to, are utlhzed as luid-chambers, and the sleeves 18 referred to are pro- 18 rest in sockets 22 inthe inner ends of the chambers, packing-rings 23 being provided, if desired, to make fluid-tight joints at these points. The outer ends of the chambers are provided with covers 24, through openings in which the sleeves pass, packing-rings 25 be ing provided, if desired, at these points to make tight joints. The outer ends of the sleeves may be threaded and provided with nuts 26, which will be hereinafter referred to.

The fluid by which the operation to be hereinafter described is effected may be obtained from any desired source; but in the best constiuctions, and particularly where a cushioned pressure is to be used, 1t will be obtained from a suitable accumulator. ordinary type of accumulatoris illustrated in Fig. 1, this accumulator including a chamber or reservoir 27, in which works a piston 28. The upper end of this piston is provided with a cross-bar 29, to which are secured rods 30, these rods supporting a long collar 31, which works on the outside of. the chamber 27. This collar supports. a series of weights 32, by which t-he necessary pressure in the accumulator is obtained. Leading from the lower part of the accumulator-reservoir is a pipev 33, this pipe dividing into two branches, onecarrying fluid to one of the chambered castings and the other to the other casting. Each of these branches communicates (see Fig. 4) with an inlet-port 34 in a valve-casing 35. There are two of these valve-casings 35, one being secured to each of the chambered castings 19. The port 34 of each ofthe valve-casings 35 is con- IOC IOS

trolled by two valves 36 37, these valves bel 40, introduced into an opening in the casing,

The

this-opening being closed by a plug 41.

valve 36 controls the flow of the Huid into a port 42 formed in the casing, this port leading into the chamber on the inner side ofthe casting 19. The valve 37 controls the flow of Huid in-toa port 43 formed in the casing, this port (see dotted lines in Fig. 5) registering with an opening in the casting, which leads into the chamber on the outer side of the piston 20.' It will be understood, therefore, that when the valve-Sterns 38 are moved in one direction iluid from the accumulator under pressure is admitted to one side of the pistons, and when it is moved in the opposite direction fluid will be admitted to the other side of the pistons. By properly operating the valves through the stems 38, therefore, the sleeves 18 and the screws' 14, which are threaded into them, can be moved outward to carry the roll 8 away from the roll 6 or can be moved in the opposite direction to bring the rolls into working relation. When the 4sleeves are moved inward,the nuts 26,before referred to, strike against the bosses on the covers 24and limit the inward movement of the roll, so that the roll, no matter what the pressure in the accumulator is, comes back to the given point of adjustment which was deternined by the setting ofthe screws 14.

Each of the casings 35 is provided with a discharge-port 44, there being a communication between each port 42 and a dischargeport 44, which is closed by a valve 45, mounted on the stem 38, before referred to. Each of these discharge-ports 44 leads into another discharge-port 46 in each plug 41, there being a communication between each dischargeport 46 and a port 43, which is closed by a valve 47 on the stem 38. The several valves on the stems 38- are so arranged that when the valves 36-are closed the va ves 45 are opened, so as to allow the uid which has been introduced on the inner side of the pistons 20 to escape. So, also, when the valves 37 are closed the valves 47 are opened, allowing the escape of the Huid from the other side of the pistons into the discharge-ports. The discharge-ports 46 communicate with suitable discharge-pipes 48.

out to form castings, the chambers beingf Located in each of' The operating means for the stems 38 may be of any suitable character. As shown, there are provided bell-cranks 49 `50, these bell-cranks being pivoted in brackets 51, secured to the frame. The arms 5() of these bell-cranks are connected to the valve-stems 38, and the arms 49 are connected by means of rods 52 to arms 53, to short shafts 54, mounted in brackets 55 on the frame. These short shafts have arms 56 extending up therefrom, the arms on the two brackets being connected by a tie-rod 57, which may lbe used as a handle to operate both shafts and the valves.

In the construction shown in Figs. 6 and 7 the back roll is moved to throw the rolls into and out of working relation instead of the front roll, as in the construction just described. In this construction, which is particularly advantageous for certain types of machines, each side frame is provided with a removable cap 59, these caps being held in place by rods 60, extending through the frame, these rods being provided with nuts These removable caps are chambered closed by covers 62. these chambers are `pistons 63, these pistons being provided with headedstems 64, which take into collars 65, secured to the bearings 3 of the .back roll. The casing 35 is the same as that shown inl the construction heretofore described and the manner of controlling the admission of the iuid4 the same. The construction shown in Figs. 6 and 7 is simpler in some respects than the construction shown in t-he other figures, and is therefore cheaper to make. It also adapts itself very readily to the reconstruction of machines already built,

`it being possible to readily apply to such machines the removable caps with the valve construction attached thereto.

The operation ofthe machine will be readily understood from the preceding description. Should any foreign body start to pass between the rolls, it will be seen that they can be instantly separat ed by a proper manipulation of the rie-rod 57 and then brought back again into working position. Further, it will be understood that the construction lends itself readily to maintaining a cushioned pressure on the rolls, so that the rolls can readily separate automatically if foreign bodies are introduced between them before the operator sees them.

Changes and variations may be made in the constructions by which the invention is carried into edect. The invention is not, therefore, to be limited to the specific constructions hereinbefore shown and described.

What is claimed is- 1. The combination with a pair of rolls, of adjusting means for determining the working position of the rolls, a duid-pressure controlling device, and means for operating said device to cause the rolls to be in or out of working position.

2. The combination with a pair of rolls, of adjusting means for determining the working position of the rolls. a huid-pressure controlling device, means whereby said device is caused to maintain a cushioned pressure on the rolls in excess of the normal load thereon, and means for operating said device to cause the rolls to be in or out of working position.

3. The combination with a pair of rolls, of adjusting means for determining the working position of the rolls. a fluid-pressure controlling device, connections from said device to one of the rolls, and means for operating said device to move the roll out of and into its working position.

4. The combination with a pair of rolls, of adjusting means for determining the position of the rolls, a {luid-pressure controlling device, connections from said device to one oft-he rolls, means whereby said device is caused to maintain a cushioned pressure on the rolls in excess of the normal load thereon, and means for operating said device to move the roll into and out of working position.

5. The combination with a pair of rolls, of means including an adjusting-screw for determining the working position of the rolls, a controlling device, and means for operating said device to cause the rolls to be in or out of the working position determined by the screw.

6. The combination with a pair of rolls, of

IOO

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means including an adjusting-screw for determining the Working position of the rolls, a fluid-pressure controlling device, and means for operating saiddevice to cause the rolls to be in or out of the Working position determinedby the screw.

7. The combination with a pair of rolls, of means'inc`uding an adjusting-screw for determining the Working position of the rolls, a

fluid-pressure controlling device, means for causing said device to maintain a cushioned pressure on the roll in excessof the normal load thereon, and means for operating said device to cause the rolls to be in or out of the.

other roll, and means for operating said dei vice to move said roll into or outy of the determined Working position.y l

9. The combination with a pair of rolls, of

means for adjusting one of the rolls to deter-y mine the Working position thereof, a pair of fluid-operated pistons, said pistons being located at opposite ends of the other roll, chambers in Which saidA pistonswork, and 'means for admitting iiuid under pressure to the chambers on opposite sides of the pistons to move the rolls into and out ofthe deterchambers in W mined Working position.

10. The combination with a pair of rolls, of means for adjusting one of the rolls to determine the Working position thereof, a pair of fluid-pistons, said pistons being located at o posite ends of the other rol-l, chambers in W ich vsaid istons Work, means for maintaining the uid under pressure, and valves for admitting fluid to the chambers on opposite sides of the pistons to move said roll into and out of Working position. j

11. The combination with a pair of rolls, of means for adjusting one of the rolls to de- 4 termine the working position thereof, al pair l of duid-operated pistons, said pistons being located at op osite ends of the other roll,

fhich said pistons Work,- anaccumulator, connections leading from the accumulator to both sidesy of each iston in the chamber, and means whereby t e flow from -the accumulator maybe directed into either chamber.

12. The combination with a frame, of a. pair of rolls, bearings in which said rolls are mounted, adjusting means for determining the Working position of the rolls, a pair of removable cap-pieces, controlling devices carpair of rolls, mounted in the frame, adj usting` means for determining the working position ,with the other roll of the rolls, av pair ofremovable cap-pieces adjacent to the bearings of one ofthe rolls, a

iiuid-containin chamber in each cap-piece, a plston 1n each c amber, connections from the pistons to the bearings of one of the rolls, and

pair of rolls, sliding bearings in which the p rolls are mounted, ascrew adjustment operating in connection With the bearings-of one of the rolls to determine the Working vposition of the rolls a pair of removable cap-pieces adjacent the bearings of the other rolleach cappiece being formed to provide a fluid-chamber, pistons Working in said chambers, connections from the pistons to the adjacent roll-bearings, and means for admitting fluid under ressure to either side of the piston in each c amber. j

15.- The combination With a frame, of a pair of rolls, sliding bearings in which the rolls are mounted, a screvT adjustment oper-v' ating in connection With the bearings of one of the rolls to determine` the Working position of the rolls,` a pair of removable cap-pieces adjacent the bearings of the other 'rol-l, each cap-piece being; formed to provide a fluidchamber, pistons Working in said chambers, connections from the pistons to the adjacent roll-bearings, an accumulator for maintaining the fluid under pressure,. and means for may pass to either side of the piston in each chamber. v'

j 16. The combination 'With'a frame, of a pair of rolls, shafts on which the rolls are mounted, driving-gear on the shaft of one of the rolls, intermittent gearing between the shafts wherebythe second roll is driven from the iirst roll, adjusting means for determining the Working position of the rolls, and means for moving the roll having the driving-gearing into and out of working relation Without disturbing the adjustment.

17. The combination with a frame, of a back roll, a shaft on which said roll is mounted, sliding bearings for the shaft, a drivinggear on one end of the shaft, apinion on the other end of the shaft, a front roll, a shaft on which said roll is mounted, `a pinion on said shaft meshing with the` pinion on' the backf roll shaft and driven thereby, 'adjusting means operating in connection with 'the front roll for determining the Working position of the rolls, a controlling device, and means for operating said device to cause the rolls to be in or out of Working position Without disturbing the adjustment.

18. The combination with a frame, of a back roll,1 a shaft on which said roll is mounted, sliding'bearings for the shaft, a drivinggearing'on one end of the shaft, a pinionon the other end of the shaft, a front roll, ashaft 'controlling the flow of the iuid 'so that it Ioo IIO

in which said roll is mounted, a pinion on said shaft meshing with the pinion on the back-roll shaftand driven thereby, adjusting means operating in connection with the front roll for determining the working position of the rolls, a fluid-operated controlling device, and means for operating said device to cause the rolls to be in or out of Working position without disturbing the adjustment.

19. The combination with a frame, of a front roll, a shaft on which said roll is mounted, sliding bearings for the shaft, a back roll, a shaft on which said roll is mounted, sliding bearings for that shaft, gearing between the roll-shafts, a screw adjustment operating in connection with the bearings of the front roll to determine the working position of the rolls, a controlling device, operating connections between said device and the bearings of the back roll, and means for operating said device to move the back roll into and out of working position without disturbing the adjustment.

20. The combination with a frame, of a front roll, a shaft on which said roll is mounted, sliding bearings for the shaft, a back roll, a shaft on which said roll is mounted, sliding bearings for that shaft, gearing between the roll-shafts, a screw adjustment operating in connection with the bearings of the front roll to determine the working position of the rolls, a fluid-operated controlling device, operating connections between said device and the bearings of the back roll, and means for operating said device to move the back roll into and out of working position without disturb-- ing the adjustment.

21. The combination with a frame, of a front roll, a shaft on which said roll is mounted, sliding bearings for the shaft', a pair ofadjusting-screws operating in connection with said bearings, a back roll, a shaft for that roll, bearings in which the shaft is mountedy a drivin -gear on the shaft of the back roll, intermesiing gears between the shafts of the rolls whereby the back roll drives the front roll, fluid-operated controllinflr devices connected to the bearings of'theo'ack roll, and

means for operating said devices to causel the rolls to be thrown into and out of Working position. l 22. The combination with a frame, of a front roll, a shaft cn which said roll is mounted, sliding bearings for said shaft, a pair of f adjusting-screws operating in connection i with said bearings, a back roll, a shaft for that roll, bearings in which the shaft is mounted, a driving-gear on the shaft of the back roll, intermeshing gears between the shafts of the rolls whereby the back roll drives the front roll, a pair of removable cappieces adjacent to the bearings of the back roll, fluid-operated controlling devices mounted in said removable cap-pieces, connections from said devices to the bearings of the backroll shaft, and means for operating said devices for moving the back roll into and out of wflnlrking position with respect to the front ro 23. The combination with a frame, of a front roll, a shaft on which said roll is mounted, sliding bearings for said shaft, a pair of with said bearings, a back roll, a shaft for that roll, bearings in which the shaft is mounted, a driving-gear on the shaft of the back roll, intermeshing gears between the shafts of the rolls whereby the back roll drives the front roll, a pair of removable cap-pieces adjacent to the bearings of the back roll, fluid-operated controlling devices mounted in said removable cap-pieces, connections from said devices to the bearings of the back-roll shaft, an accumulator for maintaining fluid under'pressure, connections between said accumulator and said cont-rolling devices, and means for operating said devices for moving the back roll into and out of working position with respect to the front roll.

In testimony whereof I have hereunto set witnesses.

BERNARD my hand in the presence of two subscribing j 

